I can't tell you what is in the tank cuz u guys will go off on me but what filter is best for a highly overstocked 10 gallon tank? Please state why you would pick the filter you did.
If you know that aquarium experts will not like the number of fish in your tank then why do you have so many? Just a filter alone will not help an overstocked tank the fish need room to swim around and there needs to be enough water to dillute waste untill it can be broken down by bacteria.